Clamping device



March '22, 1927.

1 BQVEY ET AI, .cuurme DEVIC Filed Dec. 10. 1925 "Patented 'ManZZ, 192.1. I p i 1 1 i'uN1rEo-sTAT s PATENT OFFICE.

' 'rr'roms novny Aim SIDNEY J. v. .BovEY; orcmcaeo, ILLINOIS; SAID SIDNEY J. v. BOVEY ASSIGNOR 'ro SAID 'rnomas BOVEY.

cLAMrING DEVICE.

Application filed' December 10, 1925. Serial No. 74,661; Our present invention relates to clamps Figure 2 is'a section thereof on line 2-2, wherein a' band, strap, or the like is provided Figure 1.

for the pufpose of encircling an ob ect, and m Figure 3 is a detached view of the pull-up the ends of the band are drawn towards each or tightening elements as viewed in Figure .5' other to securely tighten or constrict the 2 and partly in section.

same upon the article and prevent accidental Figure 4 is a side view of a slightly mod-- 60 displacement thereon or therefrom. ified design of the tightening construction In structures of this nature the ends of elements. the annulus or band are usually provided Figures 5 and- 6 are respective side and with lugs or ears that are bent, laterallyto edge views of another modificationof the the body portion thereof andmeans are protightening or constricting members. 65 vided to draw lugs or ears towards each Figure 7 is an edge view of a still further other to tighten the band. The tightening modified tightening or constricting device, means nconsist of a .boltor the like that is The drawings are, in a sense, merely sche- 'lb passed through apertures in said lugs and 'matic for the purpose of illustrating typical,

when the-nut is secured onto the bolt said vor preferred embodiments of this clamp, and 7 nut and the head of ,the bolt will engage throughout the views we have employed the outer surface of the lugs and move the, similar reference characters to designate like latter towards each other thus reducing the parts wherever the same appear.' diameter of the annulus to the desired ex- Referring first to Figures 1 and 2, it willtent; The angular corners usually formed be seen,the device preferably comprises an 75 bybending the lugs out abruptly from the annulus or encircling strap, band or the bodyof the annulus of course weakens the like designated as 10 that is provided with metal at these points causing the same to longitudinally disposed holes or recesses 11. 2 ruptureunder too great a strain, and said The annulus is made from a strip of flexible corners also have a tendency to cut or bite metal formed into a ring of the desired dithe outer surface of the article that is enameter and contour,'and outside the circumcircled by the annulus thus distortingthe latference of the ring the metal strip is given ter. \Yith the present structure the inherent reverse bends to provide outwardly extend- 30' objections to the above-mentioned device are ing loops 12, 12, that are spaced apart and successfully overcome, and we have been able have their convex porti n Opposite each 1 toprovide a clamp in which the co-ac ion. other as shown in Figure 1; The curvature. between the lugs and tightening means is of the loops is suchas to conform to the such that'the circularity of the annulus iS' curvature of the convexly curved surfaces 35 maintained under the pulling-up action and 13 and 14 of the respective blocks 15 and the engaging surfaces of the respective por- 16 that are positioned in thesefloops. The tions ofthe lugs and tigh mng m ns i blocks just mentioned are elongated half-cyl such that they constantly accommodate inders, that are transversely bored as at 17 themselves to the divers positions in which d 18 tively, th forme bore being 40 they may be forced. The clamp which we preferably threaded amLthe latter being have designed is both novel and simple insmooth. 'A bolt 19 or the'like, with a suit-, constructioii riandis dependable in use, and able head 20, has its shank passed-through is easy to'i 'ii all. Q "i::-; ;,thebore' of block 16,the opposite or alining We prefer tb carryout our invention and apertures 11 in the loops, and is screwed 45 to accomplish'the sevueral objects thereof in into the threaded bore 17 of the block 15,

substantially the mannerhereinafter fully, and it will be understood "that the farther' described, and as more particularly pointed the bolt is screwed into the block 15 the out inthe claims, reference being made to closer the -facln surfaces of the loops will flihe accompanying drawings that form a part approach each her. and. the t ght-er the 50 of this specification. annulus will b drawn together or con- I th dra i stricted around the article being clam'ped. Figure 1 is a side or edge view of the In order to prevent bulging of the article clamping annulus with portions of the between the :loops 1n the event it 1s a flexible clamping means in section. p pe, or rubber hose, or the like, a segmentally curved shield or guard may be placed over the open space that separates the loops, and for convenience as well as to prevent accidental dislodgement, said shield may be provided at one end with a hooleQiZ that is inserted into one of the apertures 11 in the, portion of the metal strip that forms the annulus or ring 10. In some cases it is found desirable to provide an extension 23 to the clamp and this is acconiplished by forming one of the bonds for the loops at a distance back of. the respective end of the metal, so that thereby the clamp may be used as a pipehanger by nailing or otherwise at-.'

taching this extension to a floor-joist, a rafter, or other supporting element.

Numerous modifications of the structure just described are possible, the gist of the invention residing in providing the annulus with curved loops that are engaged by the rounded surfaces of blocks or other members that form a part of the means for drawing the loops towards each other. Several of such modifications :II'O lIGI'QIII illustrated, that in Figure 3 comprising substantially of the same elements that have,

been described in connection with Figures 1 and 2, withthe exception that the bolt is bifurcated longitudinally and the metal ou provided with a tightening nut 24 that screws up against. the outer flat surface of the block 15 and the latter has a smooth bore 25 instead of being threaded as in Fig ure 1.

In Figures 4 and 5 and 7 the block 14 is dispensed with, as well as the conventional polygonal head of the bolt 19, and in lieu thereof the ends of the bolts, shown in the respective views are formed with lateral members that present convex surfaces to the inner surfaces of the loops 12. In Figure 4 the unthr-eaded end of the bolt is slitted or each side of the slit is bent laterally to provideoppositely projecting arms 26. In Figures 5 and 6, the unthreaded end of the bolt is elongated and said elongated portion is first bent laterally and then given two oppositely disposed reverse bends 27, 27, and the end 28 is turned towards the' shank in alinement with the portion extending from the first bend, so that convex faces are present ed to the surfaces of the loop with which the In Figure" 7 the unthreaded portion of the bolt 19 is passed transversely through a cross bar 30 that may n'ietaland the shank secured therein in any suitable manner, which of course provides a transverse member having the desired convexity of engaging surface. In. all of these modified types the opposing block 15 has an un'threaded bore and the tightening nut 24 is employed upon the threaded portion of the bolt member 19 in the detailed in Figure 3.

\Vith .all the structures heretofore described, the convex surfaces of the transverse elements will engage with the curved portions of the loops 1 2 and when the clamp is being tightened the parts will accon1modate themselves to the relative changes of position that take place. Also it will be seen that the block 16 interposed between the bend of the bolt and the'adjacent loop the block will space the head from the restricted space close into the loop and will thereby same manner as permit a wrench or other tool being used iii-Figures 3 to 7 where the block 15 is provided with an unthreaded bore and the tightening is doneby the nut24 that will engage the block.

IV hat wetclaim is l. A clamping device comprising an encircling strap, lugs adjacent the ends of said strap and having concave surfaces, elongated element that is said lugs, separated transverse. members at opposite ends of said element each having a convex face engaged with the respective sur faces of said lugs, and a rotatable element engaged with one of said members and adapted to move said members towards each other.

2'.- A clamping circling strap, thereof,

device comprising an encurved lugs a'd acent the ends transverse bored blocks having passed through i curved surfaces fitting said lugs, a headed spindle passed through said blocks and lugs, the head' of said spindle engaged with a flat surface of one of said blocks, and cam means for causing a relative movement of said blocks upon said spindle.

Signed at Chicago, in the county of Cook, and State of Illinois, this 20th day of November, 1925. I i

THOMAS BOVEY.

SIDNEY J. v. BovEY; 

